Hi Eithne,

Thank you for contacting Mearto with your appraisal inquiry.

The vast majority of these copper trays sold in Turkey and throughout the Middle East were marketed for the tourist / export trade, regardless of age; this appears to have been made in the mid 20th Century, possibly earlier, but conforms to a style that has been replicated and repeated for generations.
When these are sold at auction, they usually bring between USD$200-300; sometimes you'll see them priced higher by retail sellers either online or in brick-and-mortar stores or antiques stores.

Based on the photos and information provided, and subject to examination, this is:

A vintage Middle Eastern large engraved copper tray
mid 20th Century
Profusely engraved with stylized motifs, central medallion with indistinct calligraphy script.
39 inches diameter
CONDITION: This tray appears to be in good condition with minor oxidation and denting commensurate to age and use.
PROVENANCE: Purchased in Turkey in the 1970s
CAD$ 285-430*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia